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2003 Fiscal Year Final Research Report Summary

Surface analysis of laced dentin and adhesion promotion of resinous materials

Research Project

Project/Area Number 14571816
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Conservative dentistry
Research InstitutionHIROSHIMA UNIVERSITY

Principal Investigator

SHINTANI Hideaki  Hiroshima University, Graduate School of Biomedical Sciences, Professor, 大学院・医歯薬学総合研究科, 教授 (80034239)

Co-Investigator(Kenkyū-buntansha) HARIMA Takahiro  Hiroshima University, Medical and Dental Hospital, Research Associate, 医学部・歯学部附属病院, 助手 (90343293)
FUJITANI Morioki  Hiroshima University, Graduate School of Biomedical Sciences, Associate Professor, 大学院・医歯薬学総合研究科, 助教授 (60190055)
Project Period (FY) 2002 – 2003
KeywordsEr : YAG laser / CO2 laser / Adhesive resin / Dentin bonding / Interface of adhesion / C-factor / Moruhological study / Analytical-chemical study
Research Abstract

In order to evaluate whether laser ablation affect the dentin bonding, 1) adhesive properties of two resin bonding systems to Er : YAG or CO2 laser-irradiated dentin, 2) surface characteristics of laced dentin, and 3) effects of configuration factor of cavities (C-factor) on bond strengths of adhesives, were investigated. The ultimate objective was to establish the guideline to laser application for dentin caries treatment
Wedge-shaped defects (WSD) and #600-finished flat dentin surfaces were prepared in the freshly extracted bovine teeth and were irradiated by Er : YAG (Erwin^R, 60mJ, 10pps) or CO2 (Topal^R, 1W, 0.3 sec) laser. They were placed with Clearfil Mega Bond/AP-X or Single Bond/Z100, and were stored in distilled water at 37℃ for 24 hours. The bond strengths were examined with the micro tensile bond test, whereas the surface characteristics of laced dentin were analyzed using light microscope, scanning electron microscope, transmission electron microscope and infrared thermography. Furthermore, the staining properties of the caries detecting solution were examined on the laced dentin surface
Laser ablation of dentin reduced adhesive properties of resin bonding systems. The so-called "laser-etching" might not be effective in promoting the adhesion. Subsurface layer of laced dentin was mechanically weakened due to the formation of structural defects and heat denatured layer, leading to considerably lower adhesive properties of resin bonding systems. Lower bond strengths were obtained in the WSDs, as compared with the flat surfaces. The laser-irradiated sound dentin was stained by the caries detecting solution
It was concluded that Er : YAG or CO2 laser ablation of dentin affected the adhesive properties of resin bonding systems. At the present moment, many problems have to be investigated and resolved to establish the guideline to laser applications for dentin caries treatment

  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] Takahiro Harima: "Surface Characteristics of Laser (Er : YAG)-irradiated Dentin"接着歯学. 19. 348 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 播磨 貴裕: "レーザー処理象牙質におけるレジンの接着 第6報 接着界面の超微細構造学的ならびに分析化学的検討"日本歯科保存学雑誌. 45. 125 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 白井 憲一: "I級窩洞に応用した各種象牙質接着システムの長期接着耐久性について"日本歯科保存学雑誌. 46. 121 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 荒川 真: "回転切削器具により切削した象牙質に対する接着強さ"日本歯科保存学雑誌. 46. 74 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 播磨 貴裕: "レーザー処理象牙質におけるレジンの接着-C-factorの影響について-"第15回日本レーザー歯学会総会・学術大会プログラム/講演抄録集. 65 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hideaki Shintani: "Studies on Laser Applications to Dental Hard Tissues"Dentistry in Japan. 39. 193 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 新谷 英章: "歯牙硬組織切削用レーザーによる象牙質切削に関する研究"日本歯科医学会誌. 22. 62-69 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Morioki Fujitani: "Does Er : YAG or CO_2 laser ablation of dentin affect the adhesive properties of resin bonding systems?"Excerpta Medica International Congress Series. 1248. 161-166 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Isao Ishikawa: "Lasers in Dentistry Revolution of Dental Treatment in the New Millennium"Elsevier Science B.V.. 489 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Takahiro Harima: "Surface characteristics of laser (Er : YAG)-irradiated dentin"Adhesive. 348. 19-4 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takahiro Harima: "Adhesive properties of resinous materials to lased dentin. Part 6 Interfacial ultramorphological and chemical analysis between adhesives and lased dentin"The Japanese Journal of Conservative Dentistry. 45-Spring issue. 125 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kenichi Shirai: "Long-term durability of resin-dentin bond in class I cavity using various adhesive systems"The Japanese Journal of Conservative Dentistry. 46-Spring issue. 121 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Makoto Arakawa: "Bond strength to dentin prepared by rotary cutting instrument"The Japanese Journal of Conservative Dentistry. 46-Autumn issue. 74 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takahiro Harima: "Adhesive properties of resinous materials to lased dentin -Effects of C-factor -"Program and Abstracts of 15^<th> Annual Meeting of the Japanese Society for Laser Dentistry. 65 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hideaki Shintani: "Studies on laser applications to dental hard tissues"Dentistry in Japan. 39. 193 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hideaki Shintani: "Studies on laser applications to dental hard tissues"Journal of the Japanese Assocation for Dental Sciences. 22. 62-69 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Morioki Fujitani: "Does Er : YAG or CO2 laser ablation of dentin affect the adhesive properties of resin bonding systems?"Excerpta Medica International Congress Series. 1248. 161-166 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Isao Ishikawa: "Lasers in Dentistry. Revolution of dental treatment in the new millennium"Elsevier Science B.V.. 489 (2003)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2005-04-19  

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